Shutter Encoder is one of the best video, image and audio converter software! It is designed by professionals processors video to be as accessible and effective as possible.
The Shutter Encoder uses FFmpeg for handling encoding, supporting almost every codec you've ever heard of, as well as others you haven't.
The app has a control panel that contains a lot of settings. In them there are various features of FFmpeg such as duplicate frame detection, framerate interpolation, analytical tools, and deinterlacing and more filters.
And if all this scares you, you do not need to be an expert in coding to use the Shutter Encoder application. If you are an expert you will appreciate the application and the possibilities it provides.
You can download the application for free from the link below. On the same page you will find helpful videos for using the program and read all the possibilities it offers you.
It is a cross platform, ie it works on Windows, Mac, and Linux.
https://www.shutterencoder.com/en/